微重力条件下Pd_（40）Ni_（40）P_（20）合金凝固组织中磷原子的分布  

PHOSPHOROUS DISTRIBUTION IN Pd_(40)Ni_(40)P_(20) ALLOY SOLIDIFIED UNDER MICROGRAVITY CONDITION

作　　者：孙力玲[1] 吴奇[1] 秦志成[1] 王文魁[1] 

机构地区：[1]中国科学院物理研究所,中国科学院国际材料物理中心

出　　处：《金属学报》1996年第5期474-478,共5页Acta Metallurgica Sinica

摘　　要：在中国返地卫星上研究了Ｐｄ（４０）Ｎｉ（４０）Ｐ（２０）合金凝固样品中磷原子的分布行为。发现与重力条件下凝固样品相比，微重力条件下样品凝固组织中初生相的含磷量较低，而共晶区域内的平均磷含量较高。另外，微重力条件下样品显微组织中共晶区域内具有Ｐｄ－Ｎｉ固溶体晶格类型的相的形态和溶质原子磷含量均发生了明显的变化。讨论了微重力及重力凝固条件下溶质原子的分配原则，并对合金凝固过程中溶质原子磷的分布行为进行了分析。Phosphorous atom distribution in Pd(40)N(40)P(20) alloy solidified in a China-made recoverable satellite was studied. It was found that the amount of phosphorus in the primary phase formed under μ-g is lower than that under l-g, but in the eutectic region under μ-g is higher than that under l-g. In addition, the microstructure morphology and phosphorous content of the phase, which appeared in the eutectic region and has the lattice of Pd-Ni solid solution, were changed remarkablely. The distribution regulation of solute atoms under μ-g and l-g was discussed and the behaviour of solute atoms (P) distribution in the alloy solidification process was analysed.

关 键 词：微重力 溶质 偏析 钯镍磷合金 凝固 磷 

分 类 号：TG146.36[一般工业技术—材料科学与工程]